The corpses of French couple discovered in Dschang

The excessive Cold and chilly atmosphere in Dschang, could have necessitated the use of charcoal to heat the room. Unfortunately the carbon monoxide produced by the charcoal enveloped the small oxygen in their residence,most especially their room.

Neighbor account States that they weren't sick and therefore their death is overwhelmingly shocking. Investigation is ongoing to know exactly what killed this French Couple?